One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,4)(5,6)(7,14)(8,17)(9,12)(10,13)(11,16)(15,19)(18,20)(22,27)(23,32)(24,34)(28,31) involution — undirected(5,7)(6,11)(8,15)(9,18)(10,16)(12,19)(13,14)(17,20)(21,22,25,27)(23,29,32,30)(24,35,34,36)(26,28,33,31)(2,4)(22,28)(23,32)(26,33)(27,31)(29,36)(30,35) involution — undirected(5,8,10,9)(6,12,13,17)(7,15,16,18)(11,19,14,20)(21,23,25,32)(22,29,27,30)(24,33,34,26)(28,35,31,36)(5,9,10,8)(6,12,13,17)(7,15,16,18)(11,20,14,19)(21,24,25,34)(22,30,27,29)(23,33,32,26)(28,35,31,36)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.